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Preparation method for copper rhodium bimetal ramiform material

A bimetallic and dendritic technology, applied in the field of preparation of copper-rhodium bimetallic dendritic materials, can solve the problems of high price and low rhodium storage, and achieve high specific surface area, controllable components, and high mesopority Effect

Active Publication Date: 2017-10-17
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although rhodium plays an indispensable role in catalytic conversion, due to the low storage capacity and high price of rhodium, how to further improve its catalytic activity and utilization efficiency while reducing the use of metal rhodium has always been a major scientific problem in related fields. and key technical problems

Method used

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  • Preparation method for copper rhodium bimetal ramiform material
  • Preparation method for copper rhodium bimetal ramiform material
  • Preparation method for copper rhodium bimetal ramiform material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In a 25mL glass bottle, add 52.8mg of ascorbic acid, 19.7mg of copper acetylacetonate, 10.0mg of rhodium acetylacetonate, 5mL of oleylamine, stir at room temperature for 8 minutes, and then sonicate for 8 minutes. h, and finally cooled down to room temperature naturally, washed with n-hexane several times and stored in n-hexane solution for later use.

[0025] The morphology, composition and microstructure of the product are systematically studied by TEM, HRTEM, HAADF-STEM, XRD and other modern nano-testing and analysis techniques. TEM, HRTEM ( figure 1 a, b) Characterized as Cu-Rh (3-1) Dendritic nanocrystal structure with a diameter of about 35nm; energy spectrum analysis surface scanning (EDS) ( figure 2 a, b, c, d) and energy spectrum analysis linear scan (EDS) ( image 3 ) to characterize Cu-Rh (3-1) The dendritic nanocrystal is a core-shell structure, the middle copper is the core, and the outer rhodium branch is the heterogeneous structure of the shell.

Embodiment 2

[0027] In a 25mL glass bottle, add 52.8mg of ascorbic acid, 13.3mg of copper acetylacetonate, 20.0mg of rhodium acetylacetonate, and 5mL of oleylamine, stir at room temperature for 8 minutes, and then ultrasonicate for 8 minutes. h, and finally cooled down to room temperature naturally, washed with n-hexane several times and stored in n-hexane solution for later use.

[0028] TEM, HRTEM characterization such as Figure 4 (a, b) is Cu-Rh (1-1) Dendritic nanocrystalline structure with a diameter of about 35nm; the inner copper core becomes smaller, and the outer shell has more rhodium branches.

Embodiment 3

[0030] In a 25mL glass bottle, add 52.8mg of ascorbic acid, 6.7mg of copper acetylacetonate, 30.0mg of rhodium acetylacetonate, 5mL of oleylamine, stir at room temperature for 8 minutes, then ultrasonic for 8 minutes, and put the reaction bottle in an oil bath at 170°C for three hours. , and finally cooled down to room temperature naturally, washed with n-hexane several times and stored in n-hexane solution for later use.

[0031] TEM, HRTEM characterization such as Figure 5 (a, b) is Cu-Rh (1-3) Dendritic nanocrystalline structure with a diameter of about 30nm; the inner copper core is very small, and the outer shell has more rhodium branches.

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Abstract

The invention discloses a preparation method for a copper rhodium bimetal ramiform material. Oleylamine is taken as the reactive solvent, the weak reductant and the surfactant, ascorbic acid is taken as the coordination agent, acetylacetonate copper is taken as the copper source, acetylacetonate rhodium is taken as the rhodium source, and therefore, through selective coordination of the ascorbic acid and the rhodium, the reduction potential of the acetylacetonate copper and the reduction potential of the acetylacetonate rhodium are changed, so that the copper rhodium bimetal ramiform material is prepared.

Description

technical field [0001] The invention specifically relates to a preparation method of a copper-rhodium bimetal dendritic material. Background technique [0002] At present, mankind is facing a severe situation of global energy shortage and deteriorating environment. The development of synthetic methods for green energy materials and high-efficiency catalysts, based on the structure-activity relationship, has attracted more and more attention to the preparation of new green energy storage and chemical conversion materials with multiple functions. Noble metal nanomaterials are widely used in catalysis, energy storage and conversion, biomedicine and other fields because of their unique physical and chemical properties. In the past few decades, by adjusting the reaction thermodynamics and kinetics, the morphology, size, and composition controlled synthesis of noble metal nanocrystals has made great progress, and noble metal nanocrystals with various morphologies have been obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0553B22F1/054B22F1/17
Inventor 谢水奋王伟刘凯王媛媛王亚滨
Owner HUAQIAO UNIVERSITY
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